Test that missing parameters are explicitly set to null.

Author: Peter Amstutz

v1.0/conformance_test_v1.0.yaml

@@ -1065,3 +1065,15 @@
       }
   tool: v1.0/recursive-input-directory.cwl
   doc: Test if a writable input directory is recursivly copied and writable
+
+- output:
+    out: "t\n"
+  job: v1.0/empty.json
+  tool: v1.0/null-defined.cwl
+  doc: Test that missing parameters are null (not undefined) in expression
+
+- output:
+    out: "f\n"
+  job: v1.0/cat-job.json
+  tool: v1.0/null-defined.cwl
+  doc: Test that provided parameter is not null in expression

v1.0/v1.0/null-defined.cwl

@@ -0,0 +1,15 @@
+cwlVersion: v1.0
+class: CommandLineTool
+requirements:
+  InlineJavascriptRequirement: {}
+inputs:
+  file1: File?
+outputs:
+  out:
+    type: string
+    outputBinding:
+      glob: out.txt
+      loadContents: true
+      outputEval: $(self[0].contents)
+stdout: out.txt
+arguments: [echo, '$(inputs.file1 === null ? "t" : "f")']

v1.1.0-dev1/conformance_test_v1.1.0-dev1.yaml

@@ -1070,3 +1070,15 @@
       }
   tool: v1.1.0-dev1/recursive-input-directory.cwl
   doc: Test if a writable input directory is recursivly copied and writable
+
+- output:
+    out: "t\n"
+  job: v1.1.0-dev1/empty.json
+  tool: v1.1.0-dev1/null-defined.cwl
+  doc: Test that missing parameters are null (not undefined) in expression
+
+- output:
+    out: "f\n"
+  job: v1.1.0-dev1/cat-job.json
+  tool: v1.1.0-dev1/null-defined.cwl
+  doc: Test that provided parameter is not null in expression